X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.cpp;h=ba399b128c45ea7ab30c4440d71682fe1817ba25;hp=cbaa07e86e6c7925aa810347fc63688f63810252;hb=428962a;hpb=4f6b1bf3bee68f138d1b5fc234fd25901cffa42c;ds=sidebyside

diff --git a/src/position.cpp b/src/position.cpp
index cbaa07e8..ba399b12 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -409,16 +409,16 @@ const string Position::fen() const {
   ss << (sideToMove == WHITE ? " w " : " b ");
 
   if (can_castle(WHITE_OO))
-      ss << (chess960 ? to_char(file_of(castling_rook_square(WHITE |  KING_SIDE)), false) : 'K');
+      ss << (chess960 ? 'A' + file_of(castling_rook_square(WHITE |  KING_SIDE)) : 'K');
 
   if (can_castle(WHITE_OOO))
-      ss << (chess960 ? to_char(file_of(castling_rook_square(WHITE | QUEEN_SIDE)), false) : 'Q');
+      ss << (chess960 ? 'A' + file_of(castling_rook_square(WHITE | QUEEN_SIDE)) : 'Q');
 
   if (can_castle(BLACK_OO))
-      ss << (chess960 ? to_char(file_of(castling_rook_square(BLACK |  KING_SIDE)),  true) : 'k');
+      ss << (chess960 ? 'a' + file_of(castling_rook_square(BLACK |  KING_SIDE)) : 'k');
 
   if (can_castle(BLACK_OOO))
-      ss << (chess960 ? to_char(file_of(castling_rook_square(BLACK | QUEEN_SIDE)),  true) : 'q');
+      ss << (chess960 ? 'a' + file_of(castling_rook_square(BLACK | QUEEN_SIDE)) : 'q');
 
   if (!can_castle(WHITE) && !can_castle(BLACK))
       ss << '-';